Show HN: DayBreak, a stock brief where the AI never touches the numbers

DayBreak is a self-hosted morning brief and stock analysis tool for US equities that watches a watchlist overnight and sends a short note only when a stock moves beyond a threshold (default ±3%), has earnings within 7 days, or crosses a custom watch price. All numbers are computed deterministically in code, and a validation layer rejects any AI output containing a number not in the fact sheet or any advisory or predictive wording, falling back to a deterministic template after two violations. It includes a "Why Did It Move?" explainer comparing returns against SPY and sector ETFs, a 5-year chart with technical indicators, per-stock signal backtests, and paper-trading scorecards.